Chapter 1-2: Order of Operations

Example 1 Evaluate Expressions Evaluate each expression. ◦ ÷ 2 ⋅ 5 ◦36 ÷ ⋅ 2 - 1

Example 2 Grouping Symbols Evaluate each expression. a. 6(11 - 7) - 4(2 + 1) 4[(16 ÷ 2) - (4 + 2)]

Example 3 Fraction Bar Evaluate ◦ 3 3 ÷ 9 ◦

Example 4 Evaluate an Algebraic Expression Evaluate ◦(x 2 - 2zy) + y 3 if x = 8, y = 3 and z = 5.

Example 5 Use Algebraic Expressions Jamie has $500 to invest for 3 years. She finds a bank that will invest her money at a simple interest rate of 5%. Interest I is equal to the principle P (amount invested) times the product of the rate r as a decimal and the time t in years. ◦Write an expression that represents simple interest. ◦Find the amount of interest earned after 3 years. ◦.